> What will the interop with Rust and JavaScript look like? How will pointers be managed?

First, a disclaimer: all of this is extremely early days, and subject to change.

There's two questions hidden here: "what does the workflow look like?" and "how does this work technically?"

Currently, "what does the workflow look like" is this: https://github.com/ashleygwilliams/wasm-pack#%EF%B8%8F--how-...

"how does this work technically" is this: https://github.com/alexcrichton/wasm-bindgen

The former provides a nice workflow that's fundamentally built on the latter.